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<h1 class='fqn'><span class='in-band'>Function <a href='index.html'>paho_mqtt3as_sys</a>::<wbr><a class="fn" href=''>MQTTAsync_send</a></span><span class='out-of-band'><span id='render-detail'>
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<pre class='rust fn'>pub unsafe extern &quot;C&quot; fn MQTTAsync_send(<br>&nbsp;&nbsp;&nbsp;&nbsp;handle: <a class="type" href="../paho_mqtt3as_sys/type.MQTTAsync.html" title="type paho_mqtt3as_sys::MQTTAsync">MQTTAsync</a>, <br>&nbsp;&nbsp;&nbsp;&nbsp;destinationName: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.pointer.html">*const </a><a class="type" href="https://doc.rust-lang.org/nightly/std/os/raw/type.c_char.html" title="type std::os::raw::c_char">c_char</a>, <br>&nbsp;&nbsp;&nbsp;&nbsp;payloadlen: <a class="type" href="https://doc.rust-lang.org/nightly/std/os/raw/type.c_int.html" title="type std::os::raw::c_int">c_int</a>, <br>&nbsp;&nbsp;&nbsp;&nbsp;payload: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.pointer.html">*mut </a><a class="enum" href="https://doc.rust-lang.org/nightly/std/os/raw/enum.c_void.html" title="enum std::os::raw::c_void">c_void</a>, <br>&nbsp;&nbsp;&nbsp;&nbsp;qos: <a class="type" href="https://doc.rust-lang.org/nightly/std/os/raw/type.c_int.html" title="type std::os::raw::c_int">c_int</a>, <br>&nbsp;&nbsp;&nbsp;&nbsp;retained: <a class="type" href="https://doc.rust-lang.org/nightly/std/os/raw/type.c_int.html" title="type std::os::raw::c_int">c_int</a>, <br>&nbsp;&nbsp;&nbsp;&nbsp;response: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.pointer.html">*mut </a><a class="struct" href="../paho_mqtt3as_sys/struct.MQTTAsync_responseOptions.html" title="struct paho_mqtt3as_sys::MQTTAsync_responseOptions">MQTTAsync_responseOptions</a><br>) -&gt; <a class="type" href="https://doc.rust-lang.org/nightly/std/os/raw/type.c_int.html" title="type std::os::raw::c_int">c_int</a></pre><div class='docblock'><p>This function attempts to publish a message to a given topic (see also
::MQTTAsync_sendMessage()). An ::MQTTAsync_token is issued when
this function returns successfully. If the client application needs to
test for successful delivery of messages, a callback should be set
(see ::MQTTAsync_onSuccess() and ::MQTTAsync_deliveryComplete()).
@param handle A valid client handle from a successful call to
MQTTAsync_create().
@param destinationName The topic associated with this message.
@param payloadlen The length of the payload in bytes.
@param payload A pointer to the byte array payload of the message.
@param qos The @ref qos of the message.
@param retained The retained flag for the message.
@param response A pointer to an ::MQTTAsync_responseOptions structure. Used to set callback functions.
This is optional and can be set to NULL.
@return ::MQTTASYNC_SUCCESS if the message is accepted for publication.
An error code is returned if there was a problem accepting the message.</p>
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